"There is nothing in this world that is truly "perfect". Though it may be a rather large cliché, it is still the truth. It is the ordinary people who look up to "perfection" as an ideal and seek after it. But in truth, what is this idea of "perfection" truly worth? Nothing. Not a single thing. I detest "perfection". To be "perfect" is to be unable to improve any further. There would be no scope for "creation", not a single gap in one's knowledge or one's ability. Do you see now? To true scientists like you and I, "Perfection" is tantamount to "despair". We aspire to reach greater levels of brilliance than ever before, but never, NEVER, to reach perfection. That is the paradox through which we scientists must struggle. Indeed, it is our duty to find pleasure in that struggle. In other words, the second you allowed yourself to spout a ridiculous word like "perfect", in truth, you had already been defeated. That is if you wish to be treated as a scientist." -Captain Mayuri Kurotsuchi [Bleach]

Koryu, look. The birds are going back north.
I wonder who said that birds are free?
Though they fly in the sky freely,
If they had no place to arrive or branches to rest on,
They might even regret having wings.
What is true freedom?
It is, perhaps, having a place to go back to.
- Gensomaden Saiyuki